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zondag 6 november 2011

Slippery Bantam clutch?!

"Clutch plate dismanteling & inspection"

Take off the clutch cover plate, retained by three small screws with spring washers. Now, using service tool No. 61-319 compress the clutch springs to allow the large plate retaining circlip to be removed.

  Remove the tool, and lift off, and lift off the retaining plate complete with springs and cups. The pressure plate, and friction plates can now be taken out for inspection. Take care not to loose the mushroom headed push rods which fits in the end of the mainshaft. 
If the clutch plates or springs are the only items requiring attention the clutch not be dismantled any further.

New clutch springs hae a free length of 1-9/64" (29 mm) and if this length has reduced by more than 1/32" (0,8 mm) it is recommended that a new set be fitted
27 mm instead off 29mm
The four driving plates have segments of a special friction material securely bonded to the metal.

All these segments should be complete and unbroken. Even if there appears to be no damage to the plates or segments, the overall thickness of each segment should be measured. The thickness of a new driving plate is 1/8" (3,2mm) and if the wear is excessive the plates should be renewed.

3 mm instead of 3,2
The tags on the outer edges of the plates should be a reasonable fit in the housing slots. If there are any burrs on the tags, renew the complete plate.

The three driven plates should be free from score marks, and must be perfectly flat. To check the latter lay the plate on a piece of plate-glass, if it can be rocked it is obviously buckled and must be replaced with a new one.